Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
GARNIER
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
(origin: Fr.,) Garnir, to summons, warn, call out, furnish, supply. Italian, Guarnire; Norman, Garner, to warn, to summon, to fortify.
Region of origin: Europe
Country of origin: France
Language of origin: French